All of this is because politicians won’t face the fact that the vast welfare/spending Ponzi racket will collapse without importing young people.
But the social and economic costs of this “fix” are far, far higher than they ever imagined (or will admit) and the fix itself is flawed, because when the money runs out–as it will, because these people are net takers, not contributors–they will not only breed at a much slower rate (that’s already happening in some places) but the young muslims will turn to crime and violence as their preferred lifestyle.
It’s already happening in parts of Sydney and Melbourne, where despite a robust economy these people often live on welfare and crime in preference to working. The excuse, of course, is that they’re “discriminated against” because they don’t have Australian-sounding names. Well, it may be true now, because nobody trusts the bastards, but it wasn’t true for the Lebanese Christians who were driven out of Lebanon to Australia by these primitive thugs. Those Lebanese settled in well, with the minimum of friction.
And discrimination against Lebanese muslims is based on simple experience and self-preservation–they’ve taught us that they can’t be trusted.

I should add that the politicians are aided by all the well-meaning useful idiots who bought into the whole multiculturalism bullshit, who refuse to let hard evidence spoil their warm and fuzzies.
The articles on the right sidebar “The Misguided Advocates of Open Borders” and “BARBARIANS AT THE GATES” make the case far better than I can.

‘I believe that politicians, lawyers, busy-bodies and do-gooders are like salamis- greatly improved by hanging for a time.’ Oswald Bastable

"The loss of freedom is like cancer; it will spread slowly but surely across all parts of society until our liberty has been utterly eaten away and we are left with nothing but a half-forgotten idea of what freedom was."